A wall of chewing gum moonlights as collective art.

This ancient Greek place of assembly and marketplace is being revealed layer by layer below the modern Athens cityscape.

Gaudí's famously flamboyant architectural style is on full display in this sprawling park and garden.

Construction of Barcelona's iconic (but controversial) church is expected to be completed in 2026—a century after the death of its architect.

One of Antoni Gaudí's most classic buildings is well-known for its "dragon-back" design.

This Industrial Age architectural and engineering gem helps visitors and residents alike traverse Lisbon, “The City of Seven Hills.”

This eccentrically decorated palace is replete with grottoes, fountains, tunnels, and caves.

A king's pet, a pope's gift, an artist's inspiration, and a tragic shipwreck.

Legacy of the earthquake that nearly wiped Lisbon off the face of the Earth.

An awe-inspiring mosque in Morocco with one of the tallest minarets in the world.

This automated sculpture of two men peeing will spell out text messages with their micturition.

What looks like a suicide in progress is actually a statue of Sigmund Freud.

A mocking tribute to the past and modern leadership of Prague.

Macabre astrological automaton clock dating to the late 1400s.

Despite attempts by local police to discourage it, Beatles-inspired graffiti has been a means for artists to air grievances for decades.

One of the oldest scientific gardens in Britain, containing more than 13,302 plant species in its core collection.

The most loyal of little dogs, or a Victorian era publicity stunt?

A naturally mummified 2,000-year-old man.

Spitalfields' regal market goat is said to be a monument to the area's migrant population but most are pretty sure it's just a goat.